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Finding the Fourth Proportional to 7,098.61, 9,796.20 and 3,954.79

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Solution

The fourth proportional to 7,098.61, 9,796.20 and 3,954.79 is: 5,457.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,098.61 : 9,796.20 = 3,954.79 : x
  2. Step 2: Convert to fraction form
    7,098.61/9,796.20 = 3,954.79/x
  3. Step 3: Cross multiply
    7,098.61x = 9,796.20 × 3,954.79
  4. Step 4: Simplify right side
    7,098.61x = 38,741,913.80
  5. Step 5: Solve for x
    x = 38,741,913.80/7,098.61
  6. Step 6: Final answer
    x = 5,457.68

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.